I just did a brand new install of the latest version of DCS 1.5 on a new computer. The install went fine and I confirmed all my controllers are operating correctly. In DCS I go into Options and then Controls and I can successfully assign any key, axis, controller buttons etc. in either the Su25T or P51 (I have not installed my modules yet). However when I click the OK button to save these changes, the music stops playing in the background and the window does not close or save. The only thing I can do is hit the Cancel button and when I come back in nothing has been changed or saved. I have rebooted many times and I have even tried to click OK to save without even making any changes. The key bindings will just not save. Any help greatly appreciated.